Polymer Technology problems
- 1. __________ is a natural fibre.
Options- A. Cellulose
- B. Dacron
- C. Nylon-6
- D. none of these Discuss
Correct Answer: Cellulose
- 2. Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is
Options- A. Ni
- B. V2O5
- C. Fe
- D. aluminium triethyl combined with titanium tetrachloride Discuss
Correct Answer: aluminium triethyl combined with titanium tetrachloride
- 3. Phosphates (e.g., triceresyl, tributyl, tetrabutyl, tripheyl etc.) are added to polymers to act as
Options- A. hardeners
- B. anti-shrinkage agents
- C. plasticisers
- D. transparency improver Discuss
Correct Answer: plasticisers
- 4. Polypropylene is preferred to polythene, because the former is
Options- A. non-inflammable
- B. harder
- C. stronger
- D. both(b) & (c) Discuss
Correct Answer: both(b) & (c)
- 5. Alkyd resin is a/an
Options- A. polyamide
- B. polyester
- C. polyolefin
- D. addition polymer Discuss
Correct Answer: polyester
- 6. Condensation polymerisation is not involved in the manufacture of
Options- A. teflon
- B. polythene
- C. terylene
- D. nylon Discuss
Correct Answer: polythene
- 7. Glyptal used in the manufacture of paints & lacquers is a __________ polymer.
Options- A. polyamide
- B. polystyrene
- C. polyester
- D. polyacrylonitrile Discuss
Correct Answer: polyester
- 8. Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about __________ ° C.
Options- A. -20
- B. 50
- C. 250
- D. 500 Discuss
Correct Answer: 50
- 9. Pick out the wrong statement.
Options- A. Linear polymers are formed from bifunctional groups only and are normally thermoplastic.
- B. Cross-linked branched chain polymers are either elastometric or thermosetting.
- C. Branching in case of cross-linked polymers caused by small amount of impurities in bifunctional monomer formulation reduces its solubility and increases the softening point.
- D. Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction. Discuss
Correct Answer: Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction.
- 10. Addition polymerisation is not involved in the manufacture of
Options- A. low density polythene.
- B. poly vinyl chloride.
- C. polystyrene.
- D. polyhexamethylene adipamide. Discuss
Correct Answer: polyhexamethylene adipamide.
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